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16x - 8 - 11 + y
= 16x + y - 19
B. ( x + 6y ) + ( 8x + 4y )
x + 8x + 6y + 4y
= 9x + 10y
C. 2( 4x - 5y )
2( 4x ) + 2( - 5y )
= 8x - 10y
Terbukti tidak ada yang sama
16x-8-11+y
= 16x+y-8-11
= 16x+y-19
b)
x+6y+8x+4y
= x+8x+6y+4y
= 9x+10y
c)
2(4x-5y)
= 2.4x+2.(-5y)
= 8x-10y